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Note L - Stockholders' Equity - Schedule of Stockholders' Equity (Details) - USD ($) | 3 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Balance at March 31, 2021 | $ 65,339,976 | $ 66,865,367
Net earnings (loss) | 11,311,797 | (858,862)
Other comprehensive loss | (13,693,337) |
Paid in capital – restricted stock awards | 121,704 | 99,814
Cash dividends ($0.02 per share) | (137,865) | (143,229)
Balance at June 30, 2021 | 62,942,275 | 65,974,090
Issuance of restricted stock |  | 11,000
Common Stock [Member] |  |
Balance at March 31, 2021 | 8,334,785 | 8,295,160
Net earnings (loss) | 0 | 0
Other comprehensive loss | 0 |
Paid in capital – restricted stock awards | 0 | 0
Cash dividends ($0.02 per share) | 0 | 0
Balance at June 30, 2021 | 8,334,785 | 8,306,160
Issuance of restricted stock |  | 11,000
AOCI Attributable to Parent [Member] |  |
Balance at March 31, 2021 | (11,187,841) | 0
Net earnings (loss) | 0 | 0
Other comprehensive loss | (13,693,337) |
Paid in capital – restricted stock awards | 0 | 0
Cash dividends ($0.02 per share) | 0 | 0
Balance at June 30, 2021 | (24,881,178) | 0
Issuance of restricted stock |  | 0
Additional Paid-in Capital [Member] |  |
Balance at March 31, 2021 | 30,003,462 | 29,565,416
Net earnings (loss) | 0 | 0
Other comprehensive loss | 0 |
Paid in capital – restricted stock awards | 121,704 | 99,814
Cash dividends ($0.02 per share) | 0 | 0
Balance at June 30, 2021 | 30,125,166 | 29,665,230
Issuance of restricted stock |  | 0
Treasury Stock [Member] |  |
Balance at March 31, 2021 | (7,203,342) | (5,525,964)
Net earnings (loss) | 0 | 0
Other comprehensive loss | 0 |
Paid in capital – restricted stock awards | 0 | 0
Cash dividends ($0.02 per share) | 0 | 0
Balance at June 30, 2021 | (7,203,342) | (5,525,964)
Issuance of restricted stock |  | 0
Retained Earnings [Member] |  |
Balance at March 31, 2021 | 45,392,912 | 34,530,755
Net earnings (loss) | 11,311,797 | (858,862)
Other comprehensive loss | 0 |
Paid in capital – restricted stock awards | 0 | 0
Cash dividends ($0.02 per share) | (137,865) | (143,229)
Balance at June 30, 2021 | $ 56,566,844 | 33,528,664
Issuance of restricted stock |  | $ 0

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